电容层析成像技术及其在哈龙灭火剂两相流测量中的应用研究  

Research on the capacitance tomographytechnology and its application in the two-phase flow measurement of Halon fire extinguishing agent

作　　者：方丽丽[1] 赵建华[1] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,安徽合肥230026

出　　处：《火灾科学》2016年第1期53-58,共6页Fire Safety Science

基　　金：中央高校基本科研业务费专项资金资助(WK2320000032)

摘　　要：分析了电容层析成像技术的原理、应用现状,针对灭火管网中常见的哈龙灭火剂与氮气(空气)两相流,研究了将电容层析成像技术应用于哈龙灭火管网内对哈龙灭火剂/氮气(空气)两相流的流动状态以及空隙率进行测量的方法。根据不同物质的介电常数不同,通过电容传感器获取初始数据,然后根据获取的电容测量值和图像重建算法重建哈龙灭火剂/氮气(空气)两相流横截面的图像,最终获得灭火管网内哈龙灭火剂/氮气(空气)两相流的流动状态以及空隙率。The principle and application status of the capacitance tomography technology were analyzed.The measurement method for the flow state and void fraction of gas-liquid two-phase flow in Halon fire extinguishing agent pipeline was investigated by using the capacitance tomography technology.According to the uniqueness of dielectric constant of different materials,the initial data were obtained by capacitance sensors,and then the cross-section images of the Halon extinguishing agent/nitrogen（air）two-phase flow were rebuilt,based on capacitance and image reconstruction algorithm.By this method,the flow state and void fraction of Halon extinguishing agent/nitrogen（air）two-phase flow in fire extinguishing agent pipelines were finally achieved.

关 键 词：两相流流动状态 哈龙灭火剂 电容层析成像 空隙率 

分 类 号：X915.2[环境科学与工程—安全科学] X915.5